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Патент USA US2408284

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2,408,283
Patented Sept. 24, 1946
UNITED STATES. PATENT OFFICE y
Morey E. Wollin, Bmoklin?; Mass. '1
Application December 2'7, 1944', Serial No. 569,981
'1 Claims. (01. '10-4l9)' ~
1
2
The present invention relates to a pin tumbler
01' barrel lock which is in general use today and
is considered an improvement over the older type
various pins; the pins are all ?nally aligned and
I
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the cylinder may be turned. '
'
‘
~
,
‘
In the present invention the element positioned
in the cylinder prevents'this type of action,and
of vspring lock. The chief advantage in the barrel
type pin tumbler lock is that it provides practi
cally an in?nite combination of individual keys
further provides such an indeterminate reaction ‘
toiany‘ such "operation that 'it is practically im
possible to-align the pin in the desired manner
and therefore makes it more di?icult to ?nd a
for picking the lock. Further merits and ‘advan
key which will open the lock. Due, however, to
tages of the present invention will :be more fully
the lock construction now generally used, the lock
is far from pick-proof and, in fact, little skill is 10 understood from the description in the speci?ca
tion set forth below when taken in connection
required- to pick a barrel type lock, in some cases
> > '
the picking of the lock being comparatively easier ‘ with the drawingin which?’
Figure I shows’ a sectional view through the
than in the case of the old type spring lock.
axis of the lock in the plane of‘t'he pins.
for picking pin tumbler‘ locks although these 15 Figure 2" shows a section taken substantially
on the section line A--A of Figure 1.
'
methods have, for the most part, been concealed
Various means and methods have been'provided '
Figure 3' shows a section similar tothat shown
as far as possible and have been disclosed by the
in Figure‘ 1 with the key inserted in the lock.
manufacturers ‘of the locks only to the lock re
Figure 4 shows a section substantiallylike that
pairers and‘ locksmiths.
shown
in‘ Figure 2 with the cylinder partially 20
The present invention overcomes this objection
turned, and '
to the pin tumbler lock in that it provides a a
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3
Figure 5‘ shows a. detail of constructionof an
element shown in the other ?gures.
means whereby the lock is practically pick-proof.
The lock of the present invention is of the pin
In the’ arrangement set forth in the drawing,
tumbler type and may be opened with the usual
l- represents the barrel or shell in which there is
?at key which may be grooved or scored with the 25 eccentrically positioned: a close ?tting core or
usual markings providing a great variety of selec
cylinder 2, the turning of which controlsthe 0p
tive ‘keys that is possible in the combination of
' eration of the latch or the door bolt.
A key "10
such a construction. In the present invention
(Figure 3') inserted in the guideway ll’ corre
instead of permitting the pins in the barrel to 30 sponding to the key under proper conditions may
come in direct contact with the key, an inter
mediate element. is provided in the cylinder of
the, lock positioned within the barrel, which, ele
ment is properly positioned by the key to arrange
the'ends of the pins at the junction of the cir
cumference of the cylinder and- the barrel so that
the cylinder might be: turned. In this way any
‘ turn the cylinder or core}? for opening or closing‘
the latch or bolt on the door; The shell or barrel
it may be'provided with a plurality of recesses
as shown at'l2, 13-; M, l5‘, l6 and I‘! which may‘
be aligned in substantially the same plane‘ or in
slightly di?erent planes perpendicular'to the axis
of thecore or~cylinder. These recesses are shaped
person attempting to pick the lock‘ will be faced
to receive a plurality of pins 3; l8‘, i9; 25!, 21', 22
with the difficulty of adjusting the intermediate
which fit into the recesses so that they may freely‘ I
member in. the cylinder toprovide a second ad 40 move back and forth therein without a great deal
' justment of the-pin in the barrel.
oi‘ friction but also without much play. Each
recess is provided‘ with a spring 23 which forces
the pin in the direction outward from the recess.
As seen
Figures _1' ‘and 3', the barrel or shell
I" provided with a plurality of ‘slots 24, ‘25 and '
26 extending radially outward from the'direction
In the original methodoi picking a lock’ the
pins protruding into the cylinder are snapped
backward into‘ the recesses in the barrel while
at‘ the‘same time slight tension is exerted on the‘
cylinder so that it may be turned a hair when I
the pin has vcleared the cylinder. It has been
found that none of thepins are accurately aligned
' of the center of the core2 in alignment with the
so- that one or two‘ of them will receive the tension
recesses in which the pins are positioned... These
slots may be of such a width thatthe pins‘ iu'st
Placed. upon. the cylinder as the cylinder is ten
sioned. When, therefore, the cylinder gives way
freely slide into‘ them, The slots may be wide
slightly to pressure as the pins goup into the
barrel, the cylinder will be slightly turned, pre-‘ ‘
be provided with straight or curved sides and
straight or curved top walls from which the pins
venting the pins from falling back into the cyl
inder again. By continually snapping back the
enough to include two or more pin recesses and
project.
55
»
The core 2 is also provided with slots 21, 28 and
2,408,283
3
4
29 which are aligned with the slots 24, 25 and 26
respectively when the core is ready to receive the
the slots of said core and abutting on one end,
the ends of said pins, the other end of said plate
elements positioned in a keyway in said core, said
key as shown in Figures 1 and 2. Each slot in
the core carries a wedge-shaped plate or rocker
member 5 shown in perspective in Figure 5. This
last mentioned end being provided with an edge
plate is provided with a pin 8 perpendicular to
forming an obtuse angle and adapted to be en
gaged by a key entering the lock and having a
the face of the plate and extending both sides
corresponding obtuse angle,
therefrom. The pins rest in slots 3| and 32 which
extend into the core 2 in a direction outward
core ?tted to turn in the barrel’ said barrel hav
3. In a lock of the type described, a barrel, 2.
from the side walls of the slots 21, 28, and 29, 10 ing a plurality of freely movable pins engaging
said core, said core being slotted for ‘engagement
two such slots 3| and 32 ‘to each of the slots 21,
of said pins, p1ate elements positioned in the slots
28, 29. The wedges 5 are of such thickness that
of said core and abutting on one end, the ends
they will slide freely up and down the slots 21,
of said pins, the other end of said plate elements
28 and 29 and at the same time pivot on the pins
positioned in a keyway in said core, means pivot
8. The end walls in the slots 21-, 28' and 29 are
ing said plate elements in the sides of said slot
such that the turning of the wedges is limited or
permitting the bottom of the plate elements to
con?ned through corners of the wedges coming in
engage a keyway in said core whereby when the
contact with the end walls of the slot thus pre-.
proper key is inserted in said keyway, the ends
venting them from making a, complete rotation
and holding them in an upright position, as 20 of the pins will lie at the periphery of said core.
4. In a lock of the‘ type described, a barrel, a
viewed in Figure 1. The wedges, therefore, have
core ?tted to turn in the barrel, said barrel hav
freedom of motion up and down and also in tum
ing about-the pivots,
,
ing a plurality of freely movable pins positioned
'
therein, said barrel and core having continuing
: As indicated in Figure 5, the wedges at their
bottoms are provided with two faces 40 and III 25 slots aligned with said pins into which said pins
move, wedge elements positioned for free motion
which intersect at a point 1 in an acute angle
in said slots in the core, means pivoting said
at the bottom of the wedge. These faces, as indi
wedge elements in the walls of said slots, said
cated in Figure 3, rest on the sloping edges of the
wedge elements engaging the ends of said pins
key, 1 0 and when the key is in position to turn the
core of the lock, the pins 3, I8, I9, 20, 2| and 22 30 on one edge thereof, and a keyway in said core
aligned with the opposite edge of said wedge ele
are all pushed back to points at the circumfer
ments whereby when the proper key is inserted
ence at the core so that the core may be freely
in said keyway said pins have their ends posi
turned. The wedges or plates 5, as indicated in
tioned at the periphery of said core permitting
Figure v3, may be of different heights as well as
. 1
being provided with different angles, as indicated 35 the turning of said lock.
5. In a lock of the type described, a barrel, a
by the group of lines 6 in Figure 5. It will also
core ?tted to turn in the barrel, said barrel and
be noted from Figures 1, 2 and 3 that the wedges
said core having aligned slots, p1ate means posi
may work up and down in the slot or cavities in
tioned in said slots for turning in an axis per
the barrel and core because of the recesses 24,
25 and 26 which are provided in the barrel. As 40 pendicular to the plane of said plate and trans
lation in the plane thereof, a keyway positioned
in said core aligned with said slot for positioning
said plate means whereby the lock may be turned.
indicated in Figure l, the pins may project down
ward into the core or the wedges may project
upward into the barrel. It is preferable in this
connection to have the pins non-symmetrically
positioned with regard to the pivot in the wedge
46
so that the wedges will in all cases be tilted in
one direction or the other.
The'number of combinations possible is prac
6. In a lock of the type described, a barrel, a
core ?tted to turn in the barrel, said barrel hav
ing a plurality of freely movable pins engaging
said core, said core being slotted for engagement
of said pins, plate elements positioned in the slots
tically in?nite and greater than in the original
pin tumbler lock. Not only must the wedge be
of said core and abutting onone end, the ends
tilted in the right direction for opening the lock I
but it‘ must be at the correct height so that in
positioned in a keyway in said core, said slots
of said pins, the other end of said plate elements
engaging said grooves whereby said plate means
may be moved in translatory and turning motion.
'7. In a lock of the type described,'a barrel, a
core ?tted to turn in the barrel, said barrel hav
1. In a lock of the type described, a barreL a
core ?tted to turn in the barrel, said barrel hav
ing a plurality of freely movable pins engaging
said core, said core being slotted longitudinally
thereof, for engagement of said pins, plate ele
ments positioned in the slots of said core and
abutting on one end, the ends of said pins, the
other end of said plate elements positioned in a
keyway in said core and adapted to be engaged
having outwardly extending grooves and said
plate elements having outwardly extending pins
the present case the angle of the cut of the key
as well as the depth of depression determines the
operation of the lock.
Having now described my invention, I claim:
ing a plurality of freely movable pins engaging
said core, said core being slotted for engagement‘
60
of said pins, plate elements positioned in' the slots‘
of said core and‘abutting on one end, the ends.
of said pins, the other end of said plate elements
positioned in a keyway in said core, said slots
having outwardly extending grooves, ‘said plate
elements having one side formed with an obtuse
ing a plurality of freely movable pins engaging
angle, and outwardly extending pins non-sym
metrically positioned with respect to apex of said
angle and engaging said grooves whereby said
plate means may be moved in translatory and
said core, said core being slotted for engage
turning motion.
by the key entering the lock,
2. In a lock of the type described, a barrel, a
core ?tted to turn in the barrel, said barrel hav
ment of said pins, plate elements positioned in
MOREY E. WOLLIN.
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